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Diff for /loncom/publisher/lonretrieve.pm between versions 1.1 and 1.34.2.1

version 1.1, 2001/04/01 02:58:51 version 1.34.2.1, 2008/12/12 03:57:12
Line 1 Line 1
 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # Handler to retrieve an old version of a file  # Handler to retrieve an old version of a file
 #  #
 # (Publication Handler  # $Id$
 #   
 # (TeX Content Handler  
 #  #
 # 05/29/00,05/30,10/11 Gerd Kortemeyer)  # Copyright Michigan State University Board of Trustees
 #  #
 # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
 # 03/23 Guy Albertelli  
 # 03/24,03/29 Gerd Kortemeyer)  
 #  #
 # 03/31 Gerd Kortemeyer  # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   #
   ###
   
 package Apache::lonretrieve;  package Apache::lonretrieve;
   
Line 19  use strict; Line 34  use strict;
 use Apache::File;  use Apache::File;
 use File::Copy;  use File::Copy;
 use Apache::Constants qw(:common :http :methods);  use Apache::Constants qw(:common :http :methods);
   use Apache::loncacc;
   use Apache::loncommon();
   use Apache::lonlocal;
   use Apache::lonnet;
   use LONCAPA();
   
   # ------------------------------------ Interface for selecting previous version
   sub phaseone {
       my ($r,$fn,$uname,$udom)=@_;
       my $docroot=$r->dir_config('lonDocRoot');
   
       my $urldir='/res/'.$udom.'/'.$uname.$fn;
       $urldir=~s/\/[^\/]+$/\//;
   
       my $resfn=$docroot.'/res/'.$udom.'/'.$uname.$fn;
       my $resdir=$resfn;
       $resdir=~s/\/[^\/]+$/\//;
   
       my ($main,$suffix,$is_meta) = &get_file_info($fn);
       
       if (-e $resfn) {  
    $r->print('<form action="/adm/retrieve" method="POST">'.
     '<input type="hidden" name="filename" value="/~'.$uname.$fn.'" />'.
     '<input type="hidden" name="phase" value="two" />'.
     &Apache::loncommon::start_data_table().
     &Apache::loncommon::start_data_table_header_row().
     '<th>'.&mt('Select').'</th>'.
     '<th>'.&mt('Version').'</th>'.
     '<th>'.&mt('Published on ...').'</th>');
    if (!$is_meta) {
       $r->print('<th>'.&mt('Metadata').'</th>');
    }
    if ($is_meta
       || &Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
       $r->print('<th>'.&mt('Diffs').'</th>');
    }
    $r->print(&Apache::loncommon::end_data_table_header_row());
   
    opendir(DIR,$resdir);
    my @files = grep(/^\Q$main\E\.(\d+)\.\Q$suffix\E$/,readdir(DIR));
    @files = sort {
       my ($aver) = ($a=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/);
       my ($bver) = ($b=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/);
       return $aver <=> $bver;
    } (@files);
    closedir(DIR);
   
    foreach my $filename (@files) {
       if ($filename=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/) {
    my $version=$1;
    my $rmtime=&Apache::lonnet::metadata($resdir.'/'.$filename,'lastrevisiondate');
    $r->print(&Apache::loncommon::start_data_table_row().
     '<td><input type="radio" name="version" value="'.
     $version.'" /></td><td>'.&mt('Previously published version').' '.$version.'</td><td>'.
     localtime($rmtime).'</td>');
   
    if (!$is_meta) {
       $r->print('<td><a href="'.$urldir.$filename.'.meta" target=cat>'.
         &mt('Metadata Version').' '.$version.'</a></td>');
    }
    if ($is_meta
       || &Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
       $r->print(
         '<td><a target="cat" href="/adm/diff?filename=/~'.
         $uname.$fn.
         '&amp;versiontwo=priv&amp;versionone='.$version.
         '">'.&mt('Diffs with Version').' '.$version.
         '</a></td>');
    }
    $r->print(&Apache::loncommon::end_data_table_row());
       }
    }
    closedir(DIR);
    my $rmtime=&Apache::lonnet::metadata($resfn,'lastrevisiondate');
    $r->print(&Apache::loncommon::start_data_table_row().
     '<td><input type="radio" name="version" value="new" /></td>'.
     '<td><b>'.&mt('Currently published version').'</b></td><td>'.localtime($rmtime).
     '</td>');
    if (!$is_meta) {
       $r->print('<td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target=cat>'.
         &mt('Metadata current version').'</a></td>');           
    }
    if ($is_meta 
       || &Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
       $r->print(
         '<td><a target="cat" href="/adm/diff?filename=/~'.
         $uname.$fn.
         '&amp;versiontwo=priv'.
         '">'.&mt('Diffs with current Version').'</a></td>');
    }
    $r->print(&Apache::loncommon::end_data_table_row().
     &Apache::loncommon::end_data_table().
     '<p>'.'<span class="LC_warning">'.
     &mt('Retrieval of an old version will overwrite the file currently in construction space.').'</span></p>');
    if (!$is_meta) {
       $r->print('<p>'.'<span class="LC_warning">'.
         &mt('This will only retrieve the resource. If you want to retrieve the metadata you will need to do that separately.').
         '</span></p>');
    }
    $r->print('<input type="submit" value="'.&mt('Retrieve version').'" /></form>');
       } else {
    $r->print('<p class="LC_warning">'.&mt('No previous versions published.').'</p>');
       }
       $r->print('<p><a href="/priv/'.$uname.$fn.'">'.&mt('Back to [_1]','<span class="LC_filename">'.$fn.'</span>')
         .'</a></p>'); 
   }
   
   # ---------------------------------- Interface for presenting specified version
   sub phasetwo {
       my ($r,$fn,$uname,$udom)=@_;
       if ($env{'form.version'}) {
           my $version=$env{'form.version'};
    if ($version eq 'new') {
       $r->print('<h3>'.&mt('Retrieving current (most recent) version').'</h3>');
           } else {
               $r->print('<h3>'.&mt('Retrieving old version').' '.$version.'</h3>');
           }
    my ($main,$suffix,$is_meta) = &get_file_info($fn);
   
           my $logfile;
           my $ctarget='/home/'.$uname.'/public_html'.$fn;
           my $vfn=$fn;
           if ($version ne 'new') {
       $vfn=~s/\.(\Q$suffix\E)$/\.$version\.$1/;
           }
   
           my $csource=$r->dir_config('lonDocRoot').'/res/'.$udom.'/'.$uname.$vfn;
   
    my $logname = $ctarget;
    if ($is_meta) { $logname =~ s/\.meta$//; }
    $logname = $ctarget.'.log';
           unless ($logfile=Apache::File->new('>>'.$logname)) {
     $r->print('<span class="LC_error">'
                       .&mt('No write permission to user directory, FAIL')
                       .'</span>');
           }
           print $logfile 
   "\n\n================= Retrieve ".localtime()." ================\n".
   "Version: $version\nSource: $csource\nTarget: $ctarget\n";
           $r->print('<p>'.&mt('Copying file').': ');
    if (copy($csource,$ctarget)) {
       $r->print('<span class="LC_success">'
                         .&mt('ok')
                         .'</span>');
               print $logfile "Copied sucessfully.\n\n";
           } else {
               my $error=$!;
       $r->print('<span class="LC_error">'
                         .&mt('Copy failed: [_1]',$error)
                         .'</span>');
               print $logfile "Copy failed: $error\n\n";
           }
           $r->print('</p>'
                     .'<p><a href="/priv/'.$uname.$fn.'">'
                     .&mt('Back to [_1]',$fn)
                     .'</a></p>'); 
       } else {
          $r->print('<p class="LC_info">'.&mt('Please pick a version to retrieve:').'</p>');
          &phaseone($r,$fn,$uname,$udom);
       }
   }
   
   sub get_file_info {
       my ($fn) = @_;
       my ($main,$suffix) = ($fn=~/\/([^\/]+)\.(\w+)$/);
       my $is_meta=0;
       if ($suffix eq 'meta') {
    $is_meta = 1;
    ($main,$suffix) = ($main=~/(.+)\.(\w+)$/);    
    $suffix .= '.meta';
       }
       return ($main,$suffix,$is_meta);
   }
   
   # ---------------------------------------------------------------- Main Handler
 sub handler {  sub handler {
   
   my $r=shift;    my $r=shift;
   
   my $fn;    my $fn;
   
   if ($ENV{'form.filename'}) {  
       $fn=$ENV{'form.filename'};  # Get query string for limited number of parameters
       $fn=~s/^http\:\/\/[^\/]+\/\~(\w+)/\/home\/$1\/public_html/;  
       $fn=~s/\/[^\/]+$//;    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
     ['filename']);
   
     if ($env{'form.filename'}) {
         $fn=$env{'form.filename'};
         $fn=~s/^http\:\/\/[^\/]+//;
   } else {    } else {
       $fn=$r->filename();       $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
            ' unspecified filename for retrieval', $r->filename); 
        return HTTP_NOT_FOUND;
   }    }
        
   
   unless ($fn) {     unless ($fn) { 
      $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.       $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
          ' trying to publish empty directory', $r->filename);            ' trying to retrieve non-existing file', $r->filename); 
      return HTTP_NOT_FOUND;       return HTTP_NOT_FOUND;
   }     } 
   
 # ----------------------------------------------------------- Start page output  # ----------------------------------------------------------- Start page output
     my $uname;
     my $udom;
   
     ($uname,$udom)=
       &Apache::loncacc::constructaccess($fn,$r->dir_config('lonDefDomain'));
     unless (($uname) && ($udom)) {
        $r->log_reason($uname.' at '.$udom.
            ' trying to publish file '.$env{'form.filename'}.
            ' ('.$fn.') - not authorized', 
            $r->filename); 
        return HTTP_NOT_ACCEPTABLE;
     }
   
   my $uname=$ENV{'user.name'};    $fn=~s{/~($LONCAPA::username_re)}{};
   my $udom=$ENV{'user.domain'};  
   
   $r->content_type('text/html');    &Apache::loncommon::content_type($r,'text/html');
   $r->send_http_header;    $r->send_http_header;
   
   $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');    $r->print(&Apache::loncommon::start_page('Retrieve Published Resources'));
   
   $r->print(  
    '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');  
   
   my $thisdisfn=$fn;  
   $thisdisfn=~s/^\/home\/$uname\/public_html//;  
       
   $r->print('<h1>Construction Space Directory <tt>'.$thisdisfn.'</tt></h1>');    $r->print('<h1>'
               .&mt('Retrieve previous versions of [_1]'
   my $docroot=$r->dir_config('lonDocRoot');                      ,'<span class="LC_filename">'.$fn.'</span>')
               .'</h1>');
   my $resdir=$docroot.'/res/'.$udom.'/'.$uname.$thisdisfn;    
   my $linkdir='/~'.$uname.$thisdisfn;    if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
             $r->print('<h3><span class="LC_diff_coauthor">'.&mt('Co-Author').': '.$uname.
       &mt(' at ').$udom.
                  '</span></h3>');
     }
   
     my $filename;  
     opendir(DIR,$fn);  
        while ($filename=readdir(DIR)) {  
            $filename=~/\.(\w+)$/;  
            if (($1 ne 'meta') && ($1 ne 'save') && ($1 ne 'log')) {  
       $r->print($resdir.' - '.$linkdir.' = '.$filename.'<br>');  
    }  
        }  
     closedir(DIR);  
   
     if ($env{'form.phase'} eq 'two') {
         &phasetwo($r,$fn,$uname,$udom);
     } else {
         &phaseone($r,$fn,$uname,$udom);
     }
   
   $r->print('</body></html>');    $r->print(&Apache::loncommon::end_page());
   return OK;      return OK;  
 }  }
   
   1;
   __END__
   
   =head1 NAME
   
   Apache::lonretrieve - retrieves an old version of a file
   
   =head1 SYNOPSIS
   
   Invoked by /etc/httpd/conf/srm.conf:
   
    <Location /adm/retrieve>
    PerlAccessHandler       Apache::lonacc
    SetHandler perl-script
    PerlHandler Apache::lonretrieve
    ErrorDocument     403 /adm/login
    ErrorDocument     404 /adm/notfound.html
    ErrorDocument     406 /adm/unauthorized.html
    ErrorDocument  500 /adm/errorhandler
    </Location>
   
   =head1 INTRODUCTION
   
   This module retrieves an old published version of a file.
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   =head1 HANDLER SUBROUTINE
   
   This routine is called by Apache and mod_perl.
   
   =over 4
   
   =item *
   
   Get query string for limited number of parameters
   
   =item *
   
   Start page output
   
   =item *
   
   print phase relevant output
   
   =item *
   
   (phase one is to select version; phase two retrieves version)
   
   =back
   
   =head1 OTHER SUBROUTINES
   
   =over 4
   
   =item *
   
   phaseone() : Interface for selecting previous version.
   
   =item *
   
   phasetwo() : Interface for presenting specified version.
   
   =back
   
   =cut
Removed from v.1.1  
changed lines
  Added in v.1.34.2.1

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